package org.wkg.lesson04;

public class Demo_407 {

    public static void main(String[] args) throws InterruptedException {
        Counter407 counter = new Counter407();
        //在increase与increase方法中，locker作为同一个锁对象，在实例化一个类的时候，调用这两个方法会造成锁竞争

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase1();
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("count : " + counter.count);
    }


}

class Counter407 {
    public static int count = 0;
    Object locker = new Object();

    public void increase() {
        synchronized (locker) {
            count++;
        }
    }

    public void increase1() {
        synchronized (locker) {
            count++;
        }
    }

}


